How hot is too hot


Information and questions on GL1200 Goldwings (1984-1987)
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How hot is too hot

Postby rdnunes » Tue Jun 05, 2012 10:45 pm



My 1985 1200 runs almost to the red , is this something to worry about . Does it need a new water pump , tehermostat , just flush it out . Not sure who to turn to and ask them what to replace ...thanks


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Re: How hot is too hot

Postby bustedwing » Tue Jun 05, 2012 11:36 pm

"in the red " is not a real accurate term. The gauges will tell you generally that something might be wrong, if that reading is different than what it normally is. What you should do is If the coolant has not been replaced in the last few years, then drain it out, flush the radiator and engine , if the thermostat has not been changed in some time, now is the time to do that also.The radiator should also should be blown out of all bugs and debris.Refill with proper mixture coolant , pressure test cooling system for leaks, also test radiator cap.This will fix most cooling system problems, unless the radiator is becoming clogged and not allowing coolant to flow, or water pump or head gasket problem.If you have oil in the coolant or coolant in the oil, do a compression test.Depending on how good you are with a few tools you can do the first part yourself. Getting into the engine will demand a little more mechanical knowhow but there are some real good hands on guys on this site that can walk you thru .Hopefully it will not need that, just a little TLC.
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Re: How hot is too hot

Postby rdnunes » Tue Jun 05, 2012 11:46 pm

Thanks for the info that helps me understand where to start .......
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Re: How hot is too hot

Postby virgilmobile » Wed Jun 06, 2012 1:43 am

All it takes it to have a poor 7 volt regulator to make you "think" there is a problem.
I use a IR temp gauge.I found my mid range on the gauge was 194*.
Then the fan kicked in.Just above the lowest mark was 160 *
You can always remove the cap when cold and use a thermometer to accurately measure coolant temp too.
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Re: How hot is too hot

Postby littlebeaver » Wed Jun 06, 2012 11:47 am

How hot is too hot? well if my 81 goes above the 3/4 mark that's too hot for me because it never does..
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Re: How hot is too hot

Postby WA9FWT » Fri Jun 08, 2012 10:49 pm

rdnunes wrote:My 1985 1200 runs almost to the red , is this something to worry about . Does it need a new water pump , tehermostat , just flush it out . Not sure who to turn to and ask them what to replace ...thanks


It's a good idea to replace that 7Volt regulator, they have been known to fail after a while.Our Wing Admin sells them and builds them too.In fact you will save $$ by buying from him.Check into it! Not saying this will correct your problem, but down the line it will fail sooner or later.

WA9FWT Phil


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